arm64: dts: rockchip: add the gpu for px30

The px30 contains a Mali Bifrost gpu, so add the necessary core node
for it with interrupts and powerdomains.
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Link: https://lore.kernel.org/r/20191208145508.3124-2-heiko@sntech.de

arch/arm64/boot/dts/rockchip/px30.dtsi

@@ -210,6 +210,12 @@ map0 {
 					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
 					contribution = <4096>;
 				};
+
+				map1 {
+					trip = <&target>;
+					cooling-device = <&gpu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+					contribution = <4096>;
+				};
 			};
 		};
 
@@ -924,6 +930,19 @@ emmc: dwmmc@ff390000 {
 		status = "disabled";
 	};
 
+	gpu: gpu@ff400000 {
+		compatible = "rockchip,px30-mali", "arm,mali-bifrost";
+		reg = <0x0 0xff400000 0x0 0x4000>;
+		interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "job", "mmu", "gpu";
+		clocks = <&cru SCLK_GPU>;
+		#cooling-cells = <2>;
+		power-domains = <&power PX30_PD_GPU>;
+		status = "disabled";
+	};
+
 	vopb: vop@ff460000 {
 		compatible = "rockchip,px30-vop-big";
 		reg = <0x0 0xff460000 0x0 0xefc>;